BR – Page 9 – TechConnect Briefs

Charge-Based Threshold Voltage Definition for Undoped Single Gate and Symmetric Double Gate MOSFETs

Galup-Montoro C., Schneider M.C., Cunha A.I.A., Universidade Federal da Bahia - UFBA, BR

The purpose of this paper is to extend a charge-based definition of threshold voltage, already applied to conventional bulk MOSFETs to undoped single gate and symmetric double gate MOSFETs. The threshold surface potential is determined [...]

Consistency of compact MOSFET models with the Pao-Sah formulation: consequences for small-signal analysis

Galup-Montoro C., Schneider M.C., Cunha A.I.A., Federal University of Santa Catarina, BR

Compact models for the MOSFET are based on the decomposition of the two-dimensional problem into two one-dimensional problems. Since a compact MOSFET model core consists of an input voltage equation, and an output current equation, [...]

Technological prospecting on Area of Nanotechnology with emphasis in nanostructured polymers

Borschiver S., Jose Guimaraes M., Nahum e Marietta Lissker, BR

The areas of application for nanotechnology extend to practically all industrial and service sectors. Currently there exist initiatives for investment in nanotechnology in both developed countries and those in the process of development. The present [...]

The binding site interactions between 7-chloro-tetracycline and the Tet Repressor

de Bruin P.H.S., Flores M.Z.S., Caetano E.W.S., Cavada B.S., Freire V.N., Universidade Federal do Ceará, BR

Tetracyclines are a class of broad spectrum antibiotics whose use has been limited by the emergence of bacterial resistance. The most common mechanism of resistance is regulated by the repressor protein, TetR. The structure of [...]

Charge-Based Formulation of Thermal Noise in Short-Channel MOS Transistors

Paim V.C., Galup-Montoro C., Schneider M.C., Federal University of Santa Catarina, BR

In this communication we present a charge-based formulation for the thermal noise in short-channel MOS transistors. We arrive at a closed expression for the channel noise including velocity saturation for all the operating regions of [...]

Interrelations between Threshold Voltage Definitions and Extraction Methods

Schneider M.C., Galup-Montoro C., Machado M.B., Cunha A.I.A., Federal University of Santa Catarina, BR

This paper presents a brief discussion on the main MOSFET threshold voltage definitions available in the literature as well as on associated extraction methodologies. In order to compare these definitions and methodologies, we take advantage [...]

Compact Modeling of Nonlinearities in Submicron MOSFETs

da Silva P.D., de Sousa F.R., Schneider M.C., Montoro C.G., Schneider M.C., Federal University of Santa Catarina, BR

Low power operation in RF CMOS circuits requiring low-distortion levels is often difficult to achieve due to the exponential relationship between drain current (IDS) and gate-to-source voltage (VGS) in subthreshold region. Our contribution in this work [...]

Symbolic charge-based MOSFET model

Galup-Montoro C., Schneider M.C., Federal University of Santa Catarina, BR

The new generation of compact MOSFET models provides accurate current, charge, capacitance and noise characteristics as numerical outputs of a rather complicated set of internal equations specific to each model. Clearly, numerical circuit simulation is [...]

Improvement of dynamic features of an adaptive optical system for detection and correction of ophthalmic distortions

de Lima Monteiro D.W., Furtado A.S.O., Soloviev O., Ferreira Jr A.I., Teixeira F.B., Melo J.G.M., Vdovin G., Universidade Federal de Minas Gerais, BR

Precise real-time observation of retinal features, ophthalmic biometric identification and the prescription of aberration-specific contact lenses demand detection and eventual correction of ophthalmic aberrations at rates higher than those of microfluctuations and involuntary movements inherent [...]

Molecular orientation in electrospun poly(butylene terephthalate) nanofibers

Catalani L.H., Collins G., Jaffe M., University of Sao Paulo, BR

In this work, poly(butylene terephthalate) (PBT) electrospun fibers were produced by conventional electrospinning technique. All typical parameters dependences were studied. Typical behavior was observed for all parameters. In addition, we have analyzed molecular features of [...]